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| 1 | Effects of Planting Density on Growth of New Clones in Populus tomentosa显示文摘Effects of seven planting densities on the growth and tree form of nine 5-year-old new clones in Populus tomentosa were studied. The plantations, arranged with completely random block design, were located in Wuzhi County, Henan Province. Results indicated that effects of planting density on the diameter at breast height (DBH), individual volume and growing stock increment of all new clones in P. tomentosa were significant at the 1% level of probability, effects of planting density on the tree height increment of new clones B2 and B31 and on the live branches height (LBH) increment of new clones B5 and B30 were significant at the 5% level of probability, while the interaction between planting density and clone was not significant at the 5% level of probability. It was concluded that the degree of differences among new clones within the same planting density was different with different planting densities and traits. For short rotation industrial timber, clones B1, B3, B4, B5, B7, B9, B31 were suitable with the density of 1 0002 500 trees per hectare, while for bigger diameter timber, clones B1, B3, B4, B7, B9, B31 could be used with the planting density of 660833 trees per hectare. Clonal repeatability was also different in different planting densities. | Zhang Zihui Zhang Zhiyi Lin Shanzhi Li Xinguo | 2003 | Forestry Studies in China2003，5，2： | 6 |
| 2 | Comparison of G6PDH Activity and LT50 Between P. tomentosa and P. suaveolens During Freezing Acclimation显示文摘The differences of glucose-6P dehydrogenase (G6PDH) activity and freezing resistance induced by freezing acclima-tion between cuttings of freezing-sensitive P. tomentosa and freezing-resistant P. suaveolens were compared for exploring the role ofG6PDH on the enhancement of freezing resistance induced by freezing acclimation. After 5 d of freezing acclimation at -3 ℃, thcLT50 of P. tomentosa has decreased from -6.2 ℃ in control cuttings to -14.3 ℃ in freezing acclimated ones, and the increase ofG6PDH activity was observed in freezing acclimated cuttings as compared with control ones. Whereas, when P. suaveolens wasfreezing acclimated at -20℃ for 5 d, the LT50 has decreased from -27. 1℃ in control cuttings to -43.5 ℃ in freezing acclimated ones,and the activity of G6PDH increased considerably. In addition, the increase of LT50 and the decrease of G6PDH activity resultingfrom 2 d of deacclimation at 25 ℃ were found in two kinds of freezing acclimated cuttings. It is concluded that the increase in theactivity of G6PDH may associate with the inherited freezing resistance of species and the enhancement of freezing resistance of cut-tings, and may play an important role in the antifreeze process under freezing temperature, which would provide the basis for thestudy on the molecular mechanism of freezing resistance in P. suaveolens and the cloning of gene associated with freezing resistance. | Lin Shanzhi Zhang Zhiyi Lin YuanzhenCollege of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, P. R. China | 2003 | Forestry Studies in China2003，5，1： | 2 |
| 3 | Evolution of below-best-effort service显示文摘Providing different service priority levels for different kinds of traffic is an important research area in the Internet.As compared with the existing best-effort(BE)service,recent researchers consider devising the belowbest-effort algorithm to realize a low priority service.The aim of below-best-effort service is to use the available bandwidth as much as possible in the premise of not interfering standard best-effort flows.With the best-effort transmission control protocol(TCP)transporting foreground traffic,below-best-effort service can transport background traffic which users do not urgently need to use.In this paper,we review the evolution of below-besteffort service and classify and compare these below-besteffort schemes.We also present some open problems in the research of below-best-effort service and point out the future work. | Chi WANG Hongbo WANG Yu LIN Shanzhi CHEN | 2010 | Frontiers of Electrical and Electronic Engineering in China2010，5，1： | 0 |
| 4 | Continual driver behaviour learning for connected vehicles and intelligent transportation systems: Framework, survey and challenges显示文摘Modelling,predicting and analysing driver behaviours are essential to advanced driver assistance systems(ADAS)and the comprehensive understanding of complex driving scenarios.Recently,with the development of deep learning(DL),numerous driver behaviour learning(DBL)methods have been proposed and applied in connected vehicles(CV)and intelligent transportation systems(ITS).This study provides a review of DBL,which mainly focuses on typical applications in CV and ITS.First,a comprehensive review of the state-of-the-art DBL is presented.Next,Given the constantly changing nature of real driving scenarios,most existing learning-based models may suffer from the so-called“catastrophic forgetting,”which refers to their inability to perform well in previously learned scenarios after acquiring new ones.As a solution to the aforementioned issue,this paper presents a framework for continual driver behaviour learning(CDBL)by leveraging continual learning technology.The proposed CDBL framework is demonstrated to outperform existing methods in behaviour prediction through a case study.Finally,future works,potential challenges and emerging trends in this area are highlighted. | Zirui Li Cheng Gong Yunlong Lin Guopeng Li Xinwei Wang Chao Lu Miao Wang Shanzhi Chen Jianwei Gong | 2023 | Green Energy and Intelligent Transportation2023，2，4： | 0 |
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